Aggregations produced in Gases by Sudden Cooling. 749 
tester shown in fig. 3 was made. Y had a volume o£ 6 c.c. 
and Z of 36 c.c. The following table gives the results 
Fio-. 3. 
obtained with the apparatus in the case of air purified as 
described above. 
Table II. 
Temperature. 
Tester Y. 6 c.c, 
Tester Z. 36 c.c. 
-75° C 
— 80° 
0. 
: 
0. 
Several drops. 
Good shower. 
Heavy shower. 
0. 
Several drops. 
Fair shower. 
Heavy shower. 
Very heavy shower. 
-86° 
-92° 
-97° 
-102- 
-107° 
